Silicone Valve

Silicone Air Inlet Valve and Air Outlet Valve


FDA Food grade quality silicone materials

Custom air inlet and air outlet valves

No need to open the lid while in Microwaving

Free samples available for testing

Factory price, low MOQ, fast delivery

Daily capacity reaches to 200,000pcs per automation production line



Item NameOutside Diameter(mm)Slit TypeSlit Size
Air Outlet Valve18.4mmCross Slit5*5mm
Air Inlet Valve18.4mmCross Slit5*5mm


  • Lunch Box

    Lunch Box

  • Preservation Box

    Preservation Box

Product Information

Product NameFDA Food Grade Silicone Air Inlet Valve and Air Outlet Valve for Microwave Lunch Box
Model NumberHHSV19
MaterialEco-friendly FDA Approved Silicone
Hardness40 Shore A
Outside Diameter18.4mm
Slit TypeCross Slit Cut (Welcome customized slits)
Slit Size5*5mm
Mold TypeVacuum Compression Molding
Mold CavityCustomized
Daily Capacity50,000pcs/ line
MOQ50,000pcs/ size

1. Manufacture FDA food grade silicone air Inlet valve and air outlet valve for microwave lunch box,air outlet valve  and air inlet valve outer diameter are all 18.4 mm,slit type is cross slit,slit size is 5*5 mm.

2.Silicone air inlet valve made of environment friendly FDA food grade silicone raw materials.

3.Silicone air outlet valve processed by vacuum compression molding, the under-cut structure makes the air inlet valve and the air outlet valve to be assembled with lunch box lid directly, no need valve seat.

4.FDA food grade silicone valve inverted leak proof test for 7 days* 24 hours, there is no leakage for silicone air inlet valve.

5.Silicone air outlet valve tolerance of the curved wall thickness is controlled within 0.03mm,one squeeze, one dispensing, no leakage, no extra splits.

6.Non-stick silicone air inlet valve vent and relief valves, even cross slit cut makes it easy for liquid,allow the air to be in or out while in Microwaving.

7.The dispensing angle of FDA food grade silicone valve is controlled within 30 degrees.

8.The sports water bottle dispensing silicone air outlet valve is transparent,with good pulling force and elasticity.

9.LSR Injection molding silicone air inlet valve is 100% New PP Raw Material,silicone air outlet valve has Raw material LFGB certification and LIM-9150 Liquid Silicone LFGB Certification.we also have One Way Silicone Valve Appearance Patent for FDA food grade silicone valve in no drip,no hassle,no spill function.

10.For silicone air inlet valve,we used TaiWan Union M7 series injection molding machine,high precision machines make our silicone air outlet valve higher quality and more leak-proof.

11.We have 26 sets Liquid Injection Molding Machines,6 sets Compression Molding Machines,30 sets 50 Times CCD Magnified Full Inspection Equipment,Class 100,000 Clean Production Workshop,Class 10,000 Full Inspection Room,3 sets Silicone Valve Punching+Inspection Equipment,3 sets AOI Visual Inspection Equipment,2 lines UV Plasma Surface Treatment for FDA food grade silicone valve.

12.Hopewell has over 10 years in producing custom silicone and plastic flip top cap beverage dispensing closures,we have many certificates for silicone valves and plastic caps,such as:ISO9001 certificate,ISO14001 certificate,ISO13485 certificate,Clean-room production workshop,One Way Silicone Valve Appearance Patent,Raw material LFGB certification,LIM-9150 Liquid Silicone LFGB Certification.welcome to customize plastic dispensing caps,silicone valves and other silicone products.

Manufacturing Process

Manufacturing Process


Before shipment, we’ll check with customer to choose the best shipping method.



  • 1

    Can I get free samples?

    Yes, free samples can be offered, shipping costs to be paid by customers.

  • 2

    Can I change the size of the slit?

    Due to the viscosity of different liquids is different, we accept custom slit types and slit sizes.

  • 3

    Shall we pay the mold or tooling cost for this silicone air inlet valve or air outlet valve?

    For public sizes, the molds are existing, there is no mold or tooling charges. While for custom silicone control valves, the mold belongs to customer, if needed, you need to develop you own mold, please contact us for best quotation.

  • 4

    Do you have a video to show how to assemble the air inlet and outlet valves?

    We regret the assembly is finished by our customer, so we are unable to share any video.

  • 5

    Can I change the hardness of these air inlet and outlet valves?

    Yes, the hardness can be changed as requirements.

  • 6

    Can I order customized silicone check valves?

    Yes, as a professional manufacturer of premium quality silicone valves, we highly welcome custom made flow control check valves.

  • 7

    What shall I offer to custom a silicone control valve?

    For a custom silicone control valve, please kindly offer us 3D drawing or actual samples, we’ll be able to start the evaluation.

  • 8

    Are you using platinum silicone material?

    Yes, all silicone flow control valves are made of eco-friendly silicone with platinum vulcanization agent.

  • 9

    Do you accept customized packaging?

    Yes, we highly welcome custom made packaging, please provide us the detailed requirements.
Copyright © Dongguan Hopewell Silicon Plastic Tech Co., Ltd. All Rights Reserved | Sitemap | Powered by